将手指放在视图上时如何识别悬停视图? [英] How to identify hover-view when moving finger on views?

问题描述

我是android的新手，我想知道在将手指移到不同视图时如何识别悬停视图.例如，如果我的活动有5个LinearLayouts A，B，C，D，E，并且如果我从C移到B，然后移到E，则我想识别出它.如果有人知道如何实现，请给我一个例子.

I'm new to android and I want to know how to identify the hover view when moving finger on different views. As a example if my activity has 5 LinearLayouts A,B,C,D,E and if I moving from C to B then to E I want to identify that. Please if someone knows how to implement that can you give me an example.

到目前为止我尝试过的代码.

Code that I have tried so far..

@Override
    public boolean onTouch(View v, MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_HOVER_ENTER) {
            switch (v.getId()) {
                case R.id.linearLayoutA:
                    Log.d(getClass().getSimpleName(), "entered A");
                    break;

                case R.id.linearLayoutB:
                    Log.d(getClass().getSimpleName(), "entered B");
                    break;

                case R.id.linearLayoutC:
                    Log.d(getClass().getSimpleName(), "entered c");
                    break;

                case R.id.linearLayoutD:
                    Log.d(getClass().getSimpleName(), "entered d");
                    break;

                case R.id.linearLayoutE:
                    Log.d(getClass().getSimpleName(), "entered e");
                    break;
            }
        } 
        return true;
    }

谢谢.

推荐答案

在您的活动中实施View.OnTouchListener

Implement View.OnTouchListener in your activity

获取项目触摸的矩形区域，然后如果触摸点在该矩形区域内，则执行某项操作...

get rect area of item touch then if touch points are inside the that rectangle area then do something...

    @Override
        public void onWindowFocusChanged(boolean hasFocus) {
            super.onWindowFocusChanged(hasFocus);
            rect1 = new Rect(linearLayout1.getLeft(), linearLayout1.getTop(),
                    linearLayout1.getRight(), linearLayout1.getBottom());

            rect2= new Rect(linearLayout2.getLeft(), linearLayout2.getTop(),
                    linearLayout2.getRight(), linearLayout2.getBottom());
        }

/////////////////////////////

@Override
    public boolean onTouch(View v, MotionEvent event) {
        if (event.getActionMasked() == (MotionEvent.ACTION_DOWN|MotionEvent.ACTION_MOVE)) {
            if (rect1.contains((int) event.getX(), (int) event.getY())) {
                //do something when touch or moving on linearlayout1 area
            } else if (rect2.contains((int) event.getX(), (int) event.getY())) {
                //do something when touch or moving on linearlayout2 area
            }
        }
        return true;
    }

这篇关于将手指放在视图上时如何识别悬停视图?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！